You know what the best thing about Thursday is? It's almost Friday. In the meantime, here are the top stories everyone will be talking about today:

1. Finally, a clue

Officials say they are 99 percent sure debris found on a remote island in the Indian Ocean is from missing Malaysia Airlines flight 370. The plane disappeared from radar 17 months ago with 239 people on board and its whereabouts remain a mystery. Finding debris is a huge development, but there are still lots of uncertainties. Malaysian officials report also finding airplane window panes and seat cushions on the island, while Australian officials confirm no such thing. Families of the missing crew and passengers say they won't rest until there is 100 percent certainty about what happened to their loved ones. — CNN

Yesterday President Obama gave a speech intended to bolster congressional support for the Iran nuclear deal, calling the decision "the most significant since Congress voted to invade Iraq more than a decade ago." The deal would limit Iran's nuclear capabilities, in exchange for lifting harsh sanctions that have been crippling their economy. Republicans say they have enough support to kill the deal, but Obama warns doing so would also kill our "credibility as leaders of diplomacy." Congress will put the deal to a vote in September. — CNN

3. This should be interesting

Bill Cosby will be forced to talk about at least one of his many alleged crimes. He's been ordered to give a deposition under oath in a lawsuit brought by Judy Huth, a woman who accuses Cosby of sexually assaulting her at the Playboy mansion when she was only 15 years old. In the lawsuit, she claims she's suffered severe and debilitating emotional and psychological trauma as a result of the assault. Cosby denies the allegations and has counter-sued Huth for extortion. — NBC News

Tonight is Jon Stewart's last episode of The Daily Show. I'll pause here so you can weep openly into your coffee. You good? No? Me neither. Jon Stewart has been at the helm of The Daily Show for 16 years, and in that time he's transformed from a comedian making jokes about the news to a beacon of truth and humor in an increasingly ugly news media landscape. He'll be replaced by Trevor Noah, who Comedy Central hopes can breathe some new life into the format. Still, it's safe to say Stewart will be dearly missed by many. — The New York Times

An adult in Colorado has died of the plague. The Pueblo City-County Health Department didn't release any details about the death, except to say the individual may have contracted the illness from fleas on a dead rodent. Strangely, it is the second death from the plague in Colorado this year. The Centers for Disease Control say about seven people in the U.S. get the plague every year, though with modern medicine it usually is not deadly. Often it is mistaken for the flu, which delays treatment and allows symptoms to become much more severe. — CNN

6. Sad day

Today, Hiroshima commemorated the 70th anniversary of the atomic bomb being dropped by a U.S. aircraft. The bomb exploded around 8:10 a.m. on Aug. 6, 1945. The event is largely credited with ending World War II, but the devastation was immense. Roughly 70,000 people are believed to have been killed by the initial blast and thousands more died from radiation poisoning in the days, weeks and months that followed. People in Japan observed a moment of silence to mark the event, and the mayor of Hiroshima called nuclear weapons "absolute evil" and urged the world to put an end to them forever. — BBC